Synthesis and specific heat of CaPdH 3-δ with the perovskite structure

Shin Ya Ayukawa, Kazutaka Ikeda, Masatsune Kato, Takashi Noji, Shin Ichi Orimo, Yoji Koike

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)


    Single-phase samples of the hydrogen-deficient perovskite hydride CaPdH 3-δ with δ = 0.9 have successfully been synthesized. First, a homogeneous alloy of CaPd was prepared through the hydrogenation and subsequent dehydrogenation of an inhomogeneous alloy of CaPd obtained through the induction melting of Ca and Pd metals. Next, CaPdH 3-δ with δ - 0.9 was synthesized through the hydrogenation of the homogeneous CaPd alloy at room temperature. No superconductivity has been observed above 2K in the magnetic-susceptibility measurements. The specific-heat measurements have revealed that there exist optical phonons due to hydrogen vibrations with the Einstein temperature as high as about 1000 K.

    Original languageEnglish
    Article number034704
    Journaljournal of the physical society of japan
    Issue number3
    Publication statusPublished - Mar 2012


    • Hydride
    • Optical phonon
    • Perovskite
    • Specific heat
    • Superconductivity

    ASJC Scopus subject areas

    • Physics and Astronomy(all)


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